1.7B a year PL deal starting soon. What's that, just under £100M each?
CL can't touch that let alone any other wank league like Spain.
Imagine if you could cherry pick the best players in the league for Utd and Arsenal? Imagine if Utd and Arsenal got most of that £1.7B between them to go cherrypick the best players in other leagues?
You'd be left with two dream teams taking turns to gut weak opposition and their marquee forwards doing the sort of goalscoring that seemed impossible when they were in the PL.
It's boring, people worldwide know it's boring and watch the PL instead. That's why the most lucrative leagues across sports ensure most of the teams are good so every game is competitive. NFL gets this. PL gets this.
The Spanish don't but then the Spanish have a weirdly elitist view on things. Happy to be big fish in small, dried up ponds. Their football teams are there to distract them from their penniless, hopeless lives.